Wire motion for pile-wire looms



w. w. ROBERTSON WIRE MOTION FOR PILE WIRE LOOMS 2 Sheets-Sheet Filed June 5. 1927 May 1, 1928.

W. W. ROBERTSON WIRE MOTION FOR PILE WIRE LOOMS Filed June 5, 1927 2 Sheets-Shes. 2

i l W W0 bN KN Patented May 1, 1928.

UNITED STRIKE"; OZEEI'C Eli WILLIAEWY'ROBERT'SON; OFWORCESTER? MRSSACHUSETTS, ASSIGN'OR'TO' GRDMPTON & KNOWLES LOOM WORKSL' OE WORCESTER? MASSACHUSETTS; aiconrorm'mon 01 MASSACHUSETTS;

WIKE- MOTION FOR PIKE-WIRE 1100115."

This invention relates to pile wire-motions for looms wherein-the surface yarn-is wovem over pile.v wires, such for instance asdn lvilton Br-ussels or tapestry lo0ms.:

In the ordinaryso-called sidewirevloom such--as that on which- Wilton carpets are wovem there is provided-means for inserting pile wires in each successive 'shed, the pile formingwurpsbeing held upover these wires by the acquard mechanism during thetimeof insertion and; then beinggloweredto formloops aronndethe wire, -At ailater time'- in the-operation of the loom these wires-are withdrawn, either leaving the loops uncubom severingthesame, depending upon the char/ actersof fabric beingtwoveni Heretofore it has been commonpracticeto provide the wire motion-with afwire-inserting, and withdrawing device movable back and forth-along 'atrack and having ineans which acts to withdraw the foremost-wirefrom the fabric and move it rearwardly,--for insertion in the-open sheds The insertion-of the wire in an open shed is a comparatively simpleoperation, the only-work done beiing to lllQVetl-lfi wire freely between separated. planes of warp threads and it has been cus-- tomary toaccomplish this inserting moveinent ot the pile wires by means of acom-w paratively light actuator such as acable'orrope. It requires considerably moreipower to withdraw the pile wire, however, due to the fact that the same is bound tothe fabric by pile forming warp threads andrin :order to withdraw the wire it has been customary} to employ a relatively stronger endlessactuator such as a chain.

It has been common practice to fasten the rope or insertin actuator to the reciprocating wire inserting and withdrawingmember so that whenever the latter moved the cable or cord would move with it and it has fur thcr been customary to provide for periodic engagement between the chain and the member. In looms of considerable'width the stretch of the chain and the rope or cable introduce inaccuracies in the relative settings of these parts which result in undesirablestrains. The chain is moved constantly and-has one or more abutments which are operatively related to the block to give thesame a wire withdrawing movement-during certain periods in the operation. of the'loom. In former constructions the chain caused a movement of the-rope-which subjectedthelatter to -the'stra'in of turning. its driving mechanism: in a reverse direction. In con sidering the relation between the rope cable for insei'tingt-the'wire and the heavier Withdvawingmhain it will be seen" that three conditionsmay exist in? the previously usedmotionsa Ifrtheseparts are-timed exaetly the ropeYw-illwstart in its reverse movement attire-same instant that thewchain'begi-ns to movethemember on a withdrawingmtroka and the rope will therefore move without strain. Under ordinary 'mill conditions it is practicallyimpossibleto maintain -such=con-- ditions because either the ropewor the chain willfistretcl-i or theyr'will both stretch butin unlike degree and whereas the parts may be set to opera'te as deecribediyet this setting will mot continue r for very long. Another condition which might exist is that the rope could start Fits reverse movement slightly an advance of the chain, but obviouslysuch atiming: would-(submitthe? ropeto excess strain beyond that which it can safely with staadr as it would have to assist-the chain in withdrawingrtbe wire. The-third condition, namely the one previously mentioned, is that iunwhichr the chain begins. to move the memher on a withdrawing movement before the rope drunrstartsto-move the rope, but' in this condition the chain acts through the rope to move the dri-vingmechanismfor the drum-reversely before the rack and-pinion actuated mechanism for the drum are ready to give this movement and the rope must therefore either drive the drum'or stretch. 90

It is the principal object of my present invention toavoid the necessity for having oneor'another of the above-mentioned undesirable conditions by providing inserting and withdrawingmechanisms forthe wire so related that the cable or rope which insorts the/'Wire-may be disconnected from the wire inserting, and withdrawing member andstart-oir-its reverse or outbound move mentbefore the chain startsto withdraw the wire. Asshown herein I accomplish this re snlt by a rope whichis not connected directl v to the member but is operatively con nected. thereto during. the wire inserting movements only of the loom.

I accomplish this result by providing the ropewith 'anauxitiary block which is efiective to: move the main member or block on a and the member'or main block'were not manner of stopping the'bloom is to' arrest rotation of the drum which moves the rope in some wa connected with" the auitiliary block the wire might continue its inserting movement after the rope had-come to rest. 7

It is a further objectof my inventionto provide means forpreventing movement of the member or main block-away from the Y tiwith a"'-hold-pa wl"27' pivoted tothe end frame at 28; She -of-the guide sheaves 22 auxiliary blockon a wirein'serting move ment of the loom due to the momentum of the wire moving parts should the-weaver stop' the' loom witha wire partly inserted in the'shed.

With these'and other objects in view which will appear as the description proceeds, my

invention resides in the combination and arrangement of parts hereinafter 'desc' r1bed andset forth in the claims.-

i In the accompanying drawings,- wherein I have shown a convenient embodiment'of my invention, i a

Fig. 7 tion of a loom,

Fig. 2 is an enlarged view of a portion of the wire motion, parts being removed for the sake of clearness, with the parts shown at the end of the wire inserting stroke just preparatory to withdrawing the foremost wire bound into the fabric by 'thejpile forming yarns,

Fig. 3 is a view similar to Fig. 2 but with the parts shown in the position they assume at the end of the wire withdrawing stroke and with the parts in position to start the insertion of another wire,

Fig. 4 is a view similar to a portion of Fig. 3 showing the main and auxiliary' blocks in an intermediate position, showing said blocks hook-ed together to prevent movement of the wire into the shed should the weaver stop the loom, and,

Fig. 5 is a vertical section on line 5-5 of Fig; 2.

Referring particularly to Fig. 1 it will be,

seen that I have provided an end frame 10 which may project from the right of the loom proper, said end frame affording supiport for the two actuators which serve respectively to insertand withdraw the wires. The wire inserting mechanism includes a cam 11 receiving a constant rotation around a shaft 12 and imparting movement to a cam lever 13 which is connected by means of link 14 to a segment gear 15 pivoted as at 16 to the frame 10. A gear 17 meshes with the 1 is a front elevation of a wire mo-" segment 15 and in turn meshes with a pinion 18 -fast with a drum l9acarried by shaft 20. A cable "or' 'rope 21 is'secured to the drum and is led around guide sheaves 22 at their end fthe wire motion", As the shaft 12 rom t e e meet ;Wi P e so as to give the drum 19 a definite angular movementgin one direction and then an equal angular movement in the opposite direction, the etfectof-this being to move the rope or cable actuator 21 first in one direction and then in-the other; This-part of the mechanism maybe of usual construction.

'- In F igsi 2and 3 I show a mechanism for taking up slack 'Iin'the cable or rope 21, such m'echanis1n-including.a lever 23' pi'v oted at 2'4 'andhaving' aho'riz'ontal weighted ar'm 25. A "segment ratchet 26 cooperates 25 ,will tend to movef'tof the right as viewed in' Figs; 2 and?) to-take up any slack which may result'from thle stretching of the'cable 21. *The-hold pawl prevents movement of the guide sheaves to"the"le'ft and therefore insures. retention of the slack taking up movements of th'e'fs'heaves.

"The vwi'rewithdrawing mechanism comprises ajsproc'ke't30 secured to the shaft 31 which is given aconstant rotation by mechanism not shown, said sprocket turning always-in the direction indicated by the arrow;- Thechain32 is driven by the sprocket and moves over a guide sprocket 33 and also over other guide sprockets '35 and 34 lo cated respectively a'tjthe right' and left hand endsof the motion; Said chain is provided with one or'morea'b'utments 36 which act to withdraw the wire by means of mechanism about to be described. The wire'withdraiw ing devices may also be of common construction and for a further description of the same referencefmay be had to patent to Ryon No. 1,517,464.

Supported on the end frame 10 is a track 40 along which slides the main block or wire inserting and withdrawing member 41 having'a hook 42 adapted for engagement with the pile wires P. r 1

His not necessary to go into details as to the connection between the member 41 and the wires as this is well understood and may be as set forthin my prior Patent No; 1,516,686. It is suflicient for my present purposes to state that said block or member 41 must move back and forth along the track 40, movement to the left as shown in the drawings corresponding to a wire inserting movement and movement to the right corre sponding to a wire Withdrawing movement.

'Said member has pivoted thereto a hook 43 which when said members is at the left hand end of the-track 40 is in position to lie-engaged; byone-ofwthei abutments 36 Y car'- ried by thechain. The right-handend-of the; end frame is provided with a cam which engages said hook 43 to raise the-same out of operative relation with respect to the driving =chain abutment as the withdrawing of the wire is completed. For avfurther description of the operation of-thehookz- 43' with respect to the chain referencemaybe had to the aforesaid patent-to Ryont My improvements relate more particularly into effect 1 provide a fixed-guide trough 50 secured in any approvedimanner to the end frame it) and having:slidablymountedtherein an auxiliary block-51' havingia recess 52 and a pair of arms 53 through which the ends of the rope 21 extend-intoisaid re-:

cess. The ends of .said rope. may be "knotted as set forth in Figs..2, 3 and 4-0r said rope may be secured to theauxiliary =block:5l in any other manner.

A pawl is pivoted to the membertot main block at 61.and has a pin 62 project ing laterally therefrom to be engaged by a cam 63 formed on the upper partiof a fixed plate 64: secured. tothe guide trough 50.

Said pawl is adapted for cooperation with a notch 65 formed in one of the arms 53. As shown more clearlyin. F ig.'3the left hand arm 53 engages a shoulder 66 formed on the member 41, the engagement' between said arm and shoulder beingsuch that the pawl 60 can fall into the notch 65.

Under normal conditions on a wire inserting loom the cam 11 will movethesegment 15 in such a way as to'move the aux iliary block 51 to the left from the position shown in Fig. 3 by meansof the rope 21. The shoulder 66 of the main block will be engaged by the adjacent. arm 53 andas the rope moves the auxiliary block-to the left the member 41 will also be moved in the same direction, said member being disconnccted from the chain at this time. As the blocks near the end of their movement to the left the pin 62 will rise on'the cam 63 so that pawl 60 will move out of the notch 65 in the auxiliary block. The main andauxiliary blocks will therefore bedisconnected when they reach the extreme limit of their left hand movement.

On the wire withdrawing stroke the cam 11 will operate to move the auxiliary block 51 away from the main block 41 before one of the abutments 36' engages the hook 43 on the main block. This movement on the part of the auxiliary block is possible because of the fact that the hook 60 pivoted tothe main block is held in raised position out of engagement with said auxiliary block... A short time after said auxiliary block starts to move on the outbound movement one of thzflblltWSl on :the chain-will aot'rto'zmove themelnbr: 41 r on! :-the' r wire a withdmwing i stroke and said member Will -move :toi the: right asi viewed :inotheodrawisngsr until the hook/43 rises on: inclined cam-44 Ito? moveisa'id I 70 hoolroutof the-[path of the active abutment The-parts will them betin --positionto start: another wire inserting-movement.-

As:previouslywstatedrthe wires ld'O llObllle-tways enter 1 the ished r properly with I a :result- 751 that-thetweaver :must: stop the *ldom withathe; wire :inan:intermcdiate-positiom: Wdimthis z is donerthedrum 19 comes-t0 rest 'as doi also" the rope 121 and themuxiliaryblockzfla i The 2 wire, however, is; connected at; this: timecto L the main block or member 41, but because: of: the pawl '60 movement ofsaid miemb'er and consequently the-1 :wire away-g 'from'e the a auxiliary block is prevented and Fth-nvire as well as the -blockscome'to restepraetically as- 80.: soon-as does the-drum ;19.--= t;

From the: foregoing;itwwillwbe seemthat 'I have provided two independent; actuator mechanisms for-the wire insertingiand withdrawing 7 member or block, ionezfor t inserting: sand: the otherriforwithdrawingnthe rwirei-ofa pile wire loom and .':have connected thesame so that the wire inserting actuator may have its reverse movementflwithouti being; placed'under strain by;the-heavier.-wire with 9621 drawinghehai-n actuator. It will further be seen that by means of the detachable conneetion bet-weeniwthe'member and :theauxiliary blo'clrI am able-:not only-to start-:the auxiliary block on its reverse' movement before we the member starts the wire withdrawing movement. but-also I lam-able to stop movement of the member andthewi-reassoonas' the auxiliary =block: is broughtwtoz rest when the loom :is stopped byethe. Weaver-with; the, needle partly inserted intheshed:

Having thus described my invention it will be apparent that changes and -modifications may be madezthe-rein by those'skilled in the art without departing :from the spirit and scope of the invention and I do'not-wish to belimited to the details herein disclosed,v but what I'claim is:

1. In a -wire motionfor a pile wire loom having pile wires to'be inserted and withdrawn relatively to the fabric beingwoven, a pile wire inserting and withdrawing, memher, a regularly moving actuator; to-withdraw the wire, a regularly movingactuator to insert the wire, and meansto'efi'ect operative contact of one of said actuators only at-a time with the member.

2. In a wire motion for a pile wire loom having pile wires to be inserted and-with drawn relatively to the fabric being woven, a pile wire iiiserting and withdrawing memher, a pair of actuators to act alternately on the block, one of said actuators tel-give the member'a wire insertingimovement-and the other actuator to give 'saidmember' aiwireui wire inserting actuator;movable.first in one direction and-then -i n the-other, and meansto establish connection between-one of said:

actuators only and the member at a time, the actuator not operatively relatedto the -member being free to move independently,

thereof. 1

'4. In-a iwire motion for a pile wire loom having pile wires to be inserted and withdrawn relatively to the fabriebeing woven,

a piliwi-re insertingand withdrawing momber adapted to be reciprocated, a wire withdrawing actuator: moving constantly always inthesaine direction, a pile wire'inserting inember-inovable first in one direction and then in theother, spaced abutinents .on the wire withdrawing actuator to beperiodi-.

cally operatively related 'to -the member to give the latter=a wire withdraw ng movement, and means-toconnect the wire insertingactuator tot-hemember while the wire withdrawing 'a'ctuator is out of operative relation with respect to the member, and additional means to disconnect'the wire ill-'- serting actuator from'the member while the latter is operatively connected to one ot the a'butinents.

5. In a wire motion for a pile wire oom having pile wiresto be inserted and withdrawn relatively to the fabric being woven, a pile wire inserting and withdraw ng member mounted "to have reciprocating ii'iovemeiits, a pile wire withdrawing actuator, a pile wire inserting actuator, a device to establish operative engagementbetween the wire withdrawing actuator and the membcr during a portion of the operationof the loom only, means to establish operative relation between the wire inserting member and the member at other times in the operation of the loom, and additional means to disconnect the wire inserting actuator from the member during such time as the wire withdrawing actuator is opci-ativcly related to the member.

6. In a wire motion for a pile wire loom having pile wires to be inserted and withdrawn relatively to the fabric being woven, a pile wire inserting and withdrawing member mounted for reciprocating ii'iovcnients, a pile wire withdrawing actuator movable always in the same direction, a pile wire inserting actuator movable first in one direction and then in the other, devices to establish operative connection between the wire withdrawing actuator and the member at certain periodsin the' operation of the loom, means to establish operative relations between the member and'the pile wire insertingactuatorwhen the latter is moving in one direction during other periods in the operation of the loom, and additional means to disconnect the member from the pile wire inserting actuator when the latter is moving in the opposite direction during the periods when the wire withdrawing actuator is operatively related 1 to the member.

7. Ina wire motion for a pile wire looin having pile wires 'tobe insertedand with drawn relatively to-zt-he fabric being woven,

.a pile wire inserting and withdrawing member mounted-for reciprocating moven'ients, a pile- 'wire= withdrawing actuator to have operative relationship with the member duriiig-certaiii=-pei'-io'cls in the operation of the loom, a pile wire inserting actuator to have operative-relationship with the member during other periods in the operation of the loom, andineans to disconnect the wire insci-ting actuator from operative relationship with'respect to the member when the latter is operativelyconnected'to the wire withdrawingactuator.

=8, In a: wire motion for a pile 'wire loom having, pile wiresto be inserted and withdrawn relatively to the fabric being woven, a pile wire inserting and withdrawing meinber mounted for reciprocating movements,- apile wire-withdrawing actuator moving constantly in-the'same direction and having spaced abutments-to "be operatively related to the member during certain periods in the operation-of the lo0m,'a pile wire inserting actuator'moving first in one direction and then in the-other, an auxiliary block moving with the pile wire inserting actuator to have operative engagement with the member during other periods'in the operation of the loom when the wire inserting actuator is moving in-one direction, and means to disengage the auxiliary block from the member prior to the movement of said inserting actuator in the other direction.

-9. In a wire motionj fora pile wire loom having pile wires-to be inserted 'and withdrawn relatively to the fabric being woven, a reciprocable pile wire inserting-and withdrawing member, a pile wire withdrawing actuator to be operatively connectcd't'o the member during certain periods in the operation of the loom to withdraw a wire, a pile wire inserting actuator to be operatively related to the member during other periods in the operation of the loom and said wire inserting actuator moving first in onedirection to insert a pile wire when operatively related to the member, and then having an idle movement in the other direction, and means to disconnectthe pile wire inserting actuator from the member prior to the change in direction of'inovement of said wire inserting actuator at the completion of the wire inserting movement of the member.

10. In a wire motion for a pile wire loom having pile wires to be inserted and withdrawn relatively to the fabric being woven, a horizontally extending guide, a main pile wire inserting and withdrawing member mounted for reciprocation on the guide, an auxiliary block also mounted for reciprocation with respect to the guide, and a pair of actuators, one to have operative engagement with the member to withdraw a pile wire during certain periods in the operation of the loom and the other actuator being permanently connected to the auxiliary block to establish operative connection between the member and block during other periods in the operation of the loom, and means to disconnect the member and block before the auxiliary block starts to move on a non-inserting movement.

11. In a wire motion for a pile wire loom having pile wires to be inserted and withdrawn relatively to the fabric being woven, a horizontally extending guide frame, a main pile wire inserting and withdrawing member mounted on the frame for reciproeating, an auxiliary block also mounted on the frame for reciprocating, a pair of actuators one of which is operatively related to the member to give the latter a pile wire withdrawing movement during certain periods only in the operation of the loom and the other actuator being permanently connected to the auxiliary block, said member and block being operatively related on a wire inserting movement of the loom, and means to disconnect said block and member prior to a wire withdrawing movement of the member.

12. In a wire motion for a pile wire loom having pile wires to be inserted and withdrawn relatively to the fabric being woven, a pile wire inserting and withdrawing member, an auxiliary block member, a guide frame on which said member and block are mounted for reciprocating movement, an actuator for giving the member a pile wire withdrawing movement to be operatively connected to said member during certain periods only in the operation of the loom, a

pile \vire inserting actuator permanently connected to the auxiliary block member to move the latter positively in opposite directions on the guide frame, and attaching means carried by one member to have operative engagement with the other member during a wire inserting movement of the inserting and withdrawing member and to have a. movement to disconnect said member on a wire withdrawing movement.

13. In a wire motion for a pile wire loom having pile wires to be inserted and with drawn relatively to the fabric being woven, a guide frame, main and auxiliary block members mounted on said guide frame for reciprocating movements, a pile wire withdrawing actuator to be operatively connected to the main member during certain periods in the operation of the loom, a pile wire inserting actuator to be moved first in one direction and then in the other and being permanently connected to the auxiliary block member, a hook carried by one of said mem bers and adapted for engagement by the other member to cause said members to move together during a wire inserting movement, and means to move said hook so as to disconnect the members on a wire withdrawing movement of the main member.

In testimony whereof I have hereunto affixed my signature.

WILLIAM W. ROBERTSON. 

